Please update the ai-customergroups extension. In the configuration, the "product" subpart was missing.
Sorry for that!
Questions around the TYPO3 integration and plugins as well as Flow and NeosCMS
Forum rules: Always add your TYPO3/Flow, Aimeos and PHP version as well as your environment (Linux/Mac/Win)
After the index rebuild has been executed successfully, the product index contains the new positions too and therefore, the frontend shows the new order of the products.